Listen in MIDI Main key: C (confidence 138/128, minority 18%) Listen in MIDI Main key: C (confidence 138/128, minority 18%)
| Degree: | I | IIm | V | IIm | V | V | I | III | VIm | II | IIm | V | I | V | IIm | V | I | IIm | V | I | IIm | V | I | IIm | V | I | V | IV | V | I | IIm | V | IIm | V | V | I | III | VIm | II | IIm | V | I | |||||||
| Source: | C | Dm7 | G7 | Dm7 | G7 | G7 | C | E7 | Am | D7 | Dm7 | G7 | C | G7 | Dm7 | G7 | C | Gm7 | C7 | F | Gm7 | C7 | F | Fm7 | Bb7 | Eb | Bb7 | Ab7 | G7 | C | Dm7 | G7 | Dm7 | G7 | G7 | C | E7 | Am | D7 | Dm7 | G7 | C | |||||||
| Key: | C | C | C | C | C | C | C | C | C | C | C | C | C | C | C | C | C | F | F | F | F | F | F | Eb | Eb | Eb | Eb | Eb | C | C | C | C | C | C | C | C | C | C | C | C | C | C | |||||||
| Move: | +1 | +2.5 | -2.5 | +2.5 | 0 | +2.5 | +2 | +2.5 | +2.5 | 0 | +2.5 | +2.5 | -2.5 | -2.5 | +2.5 | +2.5 | -2.5 | +2.5 | +2.5 | +1 | +2.5 | +2.5 | 0 | +2.5 | +2.5 | -2.5 | -1 | -0.5 | +2.5 | +1 | +2.5 | -2.5 | +2.5 | 0 | +2.5 | +2 | +2.5 | +2.5 | 0 | +2.5 | +2.5 | ||||||||
| Common: | C,E,G | D,F,A,C | G,H,D,F | D,F,A,C | G,H,D,F | G,H,D,F | C,E,G | E,Ab,H,D | A,C,E | D,Gb,A,C | D,F,A,C | G,H,D,F | C,E,G | G,H,D,F | D,F,A,C | G,H,D,F | C,E,G | G,Bb,D,F | C,E,G,Bb | F,A,C | G,Bb,D,F | C,E,G,Bb | F,A,C | F,Ab,C,Eb | Bb,D,F,Ab | Eb,G,Bb | Bb,D,F,Ab | Ab,C,Eb,Gb | G,H,D,F | C,E,G | D,F,A,C | G,H,D,F | D,F,A,C | G,H,D,F | G,H,D,F | C,E,G | E,Ab,H,D | A,C,E | D,Gb,A,C | D,F,A,C | G,H,D,F | C,E,G | |||||||
| N: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 |
Statistics of detected keys:
| Key | Confidence | Guesses | Fixed key | Chords | Minority | |
|---|---|---|---|---|---|---|
| Main key | ||||||
| Second possible key | ||||||
Key - shows the key detected for the position. Algoritm tries to detect minor keys based on occurence of minor tonic keys in the part.
Pink chord background - shows chords, that do not interact with the previous line and form new key
Degree - shows the degree of chord over the detected key
Guesses - shows the possible keys in the position, taking previous chords into account. Guesses are always major. If there is more then one possibility, algorithm will not show it in the Key row. Those selected for ultimate keys are green
Local - shows all possible keys for the chord, without taking previous chords into account.
SLocal - shows most probable keys for the position, considering several chords before and after it
Minority - probability of the current key being minor (calculated based on surrounding chords statistic)
Move - shows how many whole tones the key jumps to the next chord:
| 0 | Same base key. e.g. C -> Cm |
| +0.5 or -0.5 | Chromatic movement. e.g. C -> C#dim |
| +1,5 or +2 or -1,5 or -2 | Mediant movement. e.g. Em -> Ab |
| +2.5 | Classic resolving V -> I. e.g. G -> C |
| -2.5 | Rock resolving IV -> I. e.g. F -> C |
| +3 | Tritone movement. e.g. H -> F |
KMove - shows how many whole tones the key jumps to the next key
Common - shows notes of the current chord, highlighting notes, that are common with the next chord
MDiss - shows notes of the current chord, which dissonate with diatonic of the Main key
Diss - shows notes of the current chord, which dissonate with diatonic of the current key
Mouse over the table to see additional information
The algorithm knows Bb and H notes. B is interpreted as H, not Bb!
Example: F-7 Bb-7 Eb7 Abmaj7 Dbmaj7 D-7 G7 Cmaj7 C-7 F-7 Bb7 Ebmaj7 Abmaj7 A-7 D7 Gmaj7 A-7 D7 Gmaj7 F#-7 H7 Emaj7 F-7 Bb-7 Eb7 Abmaj7 Dbmaj7 Db-6 C-7 Hdim Bb-7 Eb7 Abmaj7
You can use following chords: m (minor), - (dorian), 7 (sept), maj7 (major 7), dim (diminished), m7b5 (half diminished), aug or + (augmented), b9 (contains b9)
If you want to use sixth notes, use chord inversions instead. e.g. Am7 instead of C6, or Hm7b5 instead of D-6
2011 Copyright by Alexey Arkhipenko. Please feel free to write me feedback: rualark at google mail (gmail.com)
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